Hi,
I am running Fedora-13 64 bit on my Dell Laptop, The same Laptop has Windows-7 as well (dual boot system). I have chosen ext3 filesystem while installing fedora.

The file transfer speed in Fedora-13 over the network to my network drive comes out to be not more than 5MBPS.
Where as in Wndows-7 I am getting the speed of around 10~12 MBPS.

Also I found that copying files in USB flash drive is very slow than in Windows-7 . What could be the problem ?

To add it , I have another Laptop Running Ubuntu-10.04 , which also performs network transfers at 10~12 MBPS. So its just the fedora-13 who has this problem. As far as I remember this was not the case with Fedora-12

This may be a network card driver problem. Are you using wired or wireless? Can you post the 'Ethernet controller' line of the output of lspci? This would make it easier to see if its a known problem with the driver.

There are many variables. rsync is usually faster than ftp. Encrypted transfers are slower still. Is all your network hardware gigabit capable (and if it is are you running gigabit in Linux).

ethtool eth0

or whatever your port name is will give you link information.

Have you done any parameter optimization in the kernel and drivers?

Upping your txqueuelen may help

ifconfig eth0 txqueuelen 10000

might be a good test.

Does your Windows box do MTU discovery to see if it can send larger packets and have you configured your eth port for big packets locally?

system-config-network, edit the device and set MTU to the largest size valid for your network. I'm sure network manager will do this as well, but I've never made the switch. Be sure to enable MTU discovery if all the boxes aren't running at the same MTU level.

There are tons of configurations you can do to the kernel configuration as well. Examples include

but the changes won't be saved through startup - edit /etc/sysctl.conf when you're happy.

With these settings, I can run around 40 to 50 megabytes per second with rsync even with an MTU of 1500. If I upgraded my hardware on the box on the receiving end to something that handled jumbo packets, it would do better.

Thanks Mikko, for pointing out the driver problem for this ethernet card. It seems there is not yet any Official solution from Fedora community for this.
However these days I am facing another problem of overheating with my this laptop. I have sent it back to Dell. woooffff